Question

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In a circle, an angle measuring π radians intercepts an arc of length 9π. Find the radius of the circle in simplest form.

Answer 1

Explanation:

There are 2pi radians in a full circle ....pi radians is 1/2 of the circle

so ENTIRE arc length (circumference) of the circle is 18 pi

ENTIRE circumference = 18pi = pi * d

d = 18 units then r = 9 units